ArticleJournal of molecular evolution1995
T-DNA integrations in a new family of repetitive elements of Nicotiana tabacum.
Article in Journal of molecular evolution, 1995. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed, 6 citations in OpenAlex.
- Localisation of abundant and organ-specific genes expressed in Rosa hybrida leaves and flower buds by direct in situ RT-PCR.TheScientificWorldJournal · 2012Article
- Two tandemly repeated telomere-associated sequences in Nicotiana plumbaginifolia.Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology · 1997Article
- Molecular and cytogenetic analyses of stably and unstably expressed transgene loci in tobacco.The Plant cell · 1997Article
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Authors and funding
5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
A number of T-DNA insertions in the genome of Nicotiana tabacum were characterized. One class of integrations was found to have occurred in a new family of highly repetitive sequences. Three genomic regions (ecoA, ecoB, and ecoC) were isolated, all of which contain basic units of 180 bp, organized in direct tandem repeats. Several of the 180-bp elements contain an EcoRI recognition site within the repeating unit and are therefore named "eco repeats." All members of this family are weakly homologous in sequence to a previously described class of repeat elements which contained a BamHI site (HRS60 repeat family), which suggests that both groups of sequences are of common evolutionary origin. The allotetraploid genome of N. tabacum is presumed to originate from the hybridization of two diploid genomes. The HRS60 elements previously described have been found exclusively in the genome of one of the ancestors, N. sylvestris, and in N. tabacum itself. Our DNA hybridization data suggest that the eco elements originate from the genome of the other ancestor, N. tomentosiformis. Whereas the HRS60 elements are transcriptionally silent, at least some eco elements appear to be transcribed.
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